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TRMM Microwave Measurements during Hurricane Katrina: Vertical Polarization
The TMI instrument on the TRMM satellite measures microwaves emitted from the Earth's land and water. By comparing emission from different microwave frequencies, the characteristics of ice and water in the atmosphere can be determined. For example, 85 GHz microwaves are scattered by ice crystals in tropical cyclones, making cyclone rain bands appear 'colder' than the surrounding areas. By comparing 85 GHz temperatures in different polarizations with other frequency band measurements, accurate measurements of rainfall in the atmosphere can be made. This animation shows eight days of global TMI 85 GHz measurements in the Gulf of Mexico during Hurricane Katrina. The hurricane Katrina rainbands clearly show up in these images.

Vertically polarized 85GHz microwave brightness temperatures measured by the TMI instrument on TRMM from August 22, 2005 through August 30, 2005, during Hurricane Katrina.    Vertically polarized 85GHz microwave brightness temperatures measured by the TMI instrument on TRMM from August 22, 2005 through August 30, 2005, during Hurricane Katrina.
Duration: 8.0 seconds
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  512x512 (29.97 fps) MPEG-1   2 MB
  320x320     PNG           158 KB
  160x80       PNG           23 KB
  80x40         PNG           6 KB
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Color bar for the brightness temperature. 		   Color bar for the brightness temperature.

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Animation Number:3249
Animator:Horace Mitchell (SVS) (Lead)
Completed:2005-09-13
Scientist:J. Marshall Shepherd (NASA/GSFC)
Instrument:TRMM/TMI
Data set:85GHz Brightness Temperature
Data Collected:2005-08-22T24Z - 2005-08-30T22Z
Series:WMS
Keywords:
GCMD >> EARTH SCIENCE >> Atmosphere >> Atmospheric Phenomena >> Hurricanes
GCMD >> EARTH SCIENCE >> Human Dimensions >> Natural Hazards >> Meteorological Hazards
GCMD >> EARTH SCIENCE >> Spectral/Engineering >> Microwave >> Brightness Temperature
More Information on this topic available at:
http://trmm.gsfc.nasa.gov
View Animation in Google Earth Google Earth KML file is available here.
DEPC Metadata is available here.
 
 
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NASA/Goddard Space Flight Center Scientific Visualization Studio


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